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Eat more fish

Scandinavians, Japanese, and people from the Mediterranean all regularly put fish on their tables. The omega-3 fatty acids found in many varieties are great for heart health and may even reduce the risk of depression and cognitive problems.

Three delicious fish to try: wild-caught Alaskan salmon, farmed rainbow trout, and wild-caught Pacific sardines. All are high in omega-3s and low in contaminants like mercury.